Active vs. Pasive Transport

Question 1

What is passive transport?

Answer 1

Moves with gradient (high → low), no energy

Passive transport relies on the natural movement of molecules from areas of higher concentration to areas of lower concentration.

Question 2

What is active transport?

Answer 2

Against gradient (low → high), needs energy + transport proteins

Active transport requires energy expenditure to move substances against their concentration gradient.

Question 3

True or False: Passive transport requires energy.

Answer 3

False

Passive transport occurs without the input of energy.

Question 4

Fill in the blank: Active transport moves substances from _______ concentration to _______ concentration.

Answer 4

low; high

This movement is essential for maintaining concentration gradients across cell membranes.